输出电流高达300毫安内同步整流器CXSU6339升压转换器开关频率为1MHz低噪声PWM控制补偿电流模式控制

CXSU6339是一个升压转换器，它提供增强的输出来自低压电源的电压。因为它的专利设计，它开始在非常低的输入电压下上升至0.9V，待机时仅消耗15uA，使其成为单电池碱性/镍氢电池操作的理想选择开关频率为1MHz，通过允许使用微型，低剖面感应器和陶瓷电容器。电流型PWM设计是内部补偿的，减少了外部部件的数量

目录

1.产品概述       2.产品特点     3.应用范围      4.技术规格书下载（产品PDF文档） 
5.产品封装图   6.电路原理图  7.功能概述      8.相关产品

 

一,产品概述(General Description)      

     The CXSU6339 is a step-up converter that provides a boosted output

 voltage from a low voltage source. Because of its proprietary design, it starts

 up at a very low input voltage down to 0.9V, and only consumes 15uA at standby, 

making it an ideal choice for single cell alkaline/NiMH battery operations.A 

switching frequency of 1MHz minimizes solution footprint by allowing the use 

of tiny, low profile  inductors and ceramic capacitors. The current mode PWM 

design is internally compensated, reducing external parts count.CXSU6339 

is available in SOT23-3 and SOT89-3 Package.

二.产品特点(Features)

Efficiency up to 94%@Vin=3.3V, Vout=5.5V

Typical 15uA standby current

1MHz Switching Frequency allows small

inductor and output cap

Input boost-strapping allows using small or

no input cap

Low Vin Start-up Voltage down to 0.9V Ideal

for Single Alkaline Cell operations

Maximum Output Current up to 300mA

Low Noise PWM control

Internally Compensated Current Mode Control

Internal Synchronous Rectifier

Available in SOT23-3 and SOT89-3

三,应用范围 (Applications)

One to Three Cell Battery Operated Devices

Medical Instruments

Bluetooth Headsets

Flash-Based MP3 Players

Noise Canceling Headphones

四.技术规格书下载（产品PDF）

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

五,产品封装图 (Package)


六.电路原理图

七,功能概述

Symbol	Parameter	Conditions	Min	Typ	Max	Unit
Vin	Input Voltage Range		0.9		5	V
Vstart	Startup Voltage	Iout = 1mA		0.9		V
Vhold	Hold Voltage	Iout = 50mA		0.5	0.7	V
Vout	Output Voltage Range		1.8		5.5	V
	Output voltage accuracy	Iout = 0mA		2		%
	Line regulation	Iout = 50mA		0.1	0.2	%/V
	Load regulation	Iout = 0~300mA		1	2	%
Fsoc	Switching Frequency	Vout=0.95Vo, No inductor	0.7	1	1.4	MHz
	Max Duty cycle	Vout=0.95Vo, No inductor	85	90	95	%
IQ	Quiescent Current at Vout	Vout=1.05*Vo	5	8	15	uA
	Supply current at Vin	Iout = 0mA			20	uA
	Efficiency	Iout = 100mA	85			%
RdsonP	PMOS Rdson	Isw =100mA		400	600	mohm
RdsonN	NMOS Rdson	Isw =100mA		200	300	mohm
Iswlk	SW Leakage Current	Vout=5.2V, Vsw=0 or 5.2V			1	uA

八,相关芯片选择指南

升压型DC/DC转换器(DC/DC Step-up Converter )
Part No.	MODE	VIN	VOUT	IQ	FOSC	Eff.	Accu.	Power switching	IOUT	Package
CXSU6337	PFM	0.8~5.5V	2.5~6V 100mV Step	4μA	450KHz	85%	±2%	Internal MOSFET	300mA	SOT89-3 SOT23-3 SOT23-5
CXSU6337C	PFM	0.8~5.5V	2.5~6V 100mV Step	6μA	400KHz	90%	±2%	External MOSFET	-	SOT89-5 SOT23-3 SOT23-5
CXSU6338B	Sync Boost PFM/PWM	0.85~5V	3.3, 5V, ADJ	25μA	1MHz	95%	±2%	Internal Sync Rectifier	300mA	SOT23-5
CXSU6339	Sync Boost PWM	0.9~5V	1.8~3.6V	8μA	1MHz	94%	±2%	Internal Sync   Rectifier	300mA	SOT89-3 SOT23-3 SOT23-5
CXSU6340	Sync Boost PWM	0.9~5V	1.8~3.6V	8μA	1MHz	94%	±2%	Internal Sync Rectifier	300mA	SOT89-3 SOT23-3 SOT23-5